Chaeles w



-(No Model'.)

'0. W. DWBLLE.

THREE WAY VALVE.

Patented Nov. 29, 188-7.

= A ifihiiiimnn Illlllllllllllllllllllll llnnlllllllllllllll JMIHI umummlqgmm Zlumnil! n mm;

Ill.

gmmummum H",

Hlll

UNITED STATES PATENT OFFICE;

CHARLES W. DWVELLE, OF DENVER, COLORADO, ASSIGNOR OF ONE-HALF TO ROBERT E. WATSON AND ROBERT B.- STAPP, BOTH OF SAME PLACE.

TH REE-WAY VALVE.

SPECIFICATION forming part of Letters Patent No. 3'73,819,dated November 29, 1887.

Application filed December 21, 1885. Serial No. 186,361. (No model.)

form that when the valve is rotated about its stem, which is located at the center of the disk, the receiving-port will correspond with r5 either of the two ports in a corresponding valve-seat to allow of the introduction of steam or other fluid into and through the same, and when again rotated asufficient distance in the opposite direction will first cover entirely the port in question in the valve-seat by removing the conjunction of the receiving-port of the valve with the corresponding port in the seat, thereby stopping the flow of the fluid through the same, and, next, by being farther rotated in same direction will bring the exhaust port of the valve in conjunction with both the receiving and exhaust ports in the seat, the exhaust-port of the valve, being made of sufficient dimensions and proper form to fully cover the said ports in the seat. Preferably, to the rhore readilyaccomplish a perfect correspondence of the ports of the valve and those of the seat the receiving-port of the valve is made of the same di- 5 mensions as the ports in the seat, while the exhaust-port is of the size before mentioned to allow of the fluid returning from and through the receiving-port of the seat by which it entered, back by way of the exhaust-port of the 0 valve through the exhaust-port of the seat to the open air or other destination, and inform the ports are four-sided in the shape of segments of a zone, the outer and opposite inner sides of the same being segments of circles described with the center of the disk or valveseat as a common center, and the remaining two sides being lines radiating from the same center at angles to each other in the case of the receiving-port of the valve, and both of the ports in the seat of sixty degrees, and in the case of the exhaust-port in the valve of about one hundred and fifty degrees.

The valve is provided with a socket at its center for the reception of the valve-stem, which fits closely in said socket with but little 5 lost motion, and having a collar which prevents the Valve from dropping away from its seat when the pressure is off, should it be necessary or convenient to use the valve in such position as would tend to cause it so to do,

the said collar also, by having a bearing against the cap of the valve'chamber, holding the stern in position against being forced out through the stuffing-box by the pressure within, as well as serving to hold the valve in place.

The second part of my improvement relates to the construction of the valve chamber, which is preferably cylindrical in form, divided into two parts or chambers by means of a diaphragm across its axis, which diaphragm 7o constitutes the chamber next to the cap or cover, the valve-chamber proper, using the diaphragm as the valve-seat, and having the inletwopening leading into said chamber, so that the pressure of steam or fluid in the cham- 7 5 ber may hold the valve to its place in any position it may be, even with a considerable force tending to rotate it,while the other cham ber made by the diaphragm is again divided by another diaphragm in line with the axis of 8c the chamber and at right angles to the first. Leading to each chamber formed by the first with this diaphragm, and on either side of the same, through the first diaphragm or valveseat, is a port or opening, heretofore spoken of as corresponding to the receiving-port of the Valve, while an outlet or pipeconnection is also arranged with each chamber, so that when the valve is turned or rotated into proper position the steam or fluid may pass through the c inlet-port of the valve and through either port in the valveseat into the corresponding chamber, and through its outlet to a reservoir or cylinder in connection with which the valve is used, and upon the valve being ro- 5 tated in the opposite direction a proper distance the port in question in the valveseat will be closed by the valve, stopping the said flow'to the reservoir, and upon being again rotated in the last-named direction a farther 10o proper distance the two ports through the valve-seat into the chambers named will be brought in conjunction with the exhaust port of the valve, allowing the steam or fluid to return from the reservoir through the port by which it entered, and thence by way of the exhaustport in valve through the other port in valve-seat and its corresponding chamber and outlet to the open air or other destination.

Referring to the drawings, Figure 1 is an aXial half-section of valvechamloer and valve with the valve in position on its seat, 0 being the chamber, M the first diaphragm or valveseat, K K the second diaphragm. (Shown also by dotted lines across the face of the valveseat in Fig. 4.) N is the valve. L is the valvestem; Y, the collar on valve-stem. B is the cover of valve-chamber incontact with collar Y, and serving thereby to hold the valve N to the seat M when the pressure is off and when the valve is in such position as to make it desirable. D is the inlet for live steam or other fluid in such position with reference to the valve N that the pressure of the fluid will be on the upper side of the valve and will hold the valve to its seat; and H and E are open ings on each side, respectively, of the diaphragm K K, one of which can be used to admit the steam or fluid, when valve is in right position, to the reservoir or other receptacle, while at the same time by proper rotation of the valve the steam or fluid can be shut off from reservoir altogether or allowed to return through this opening by which it entered by way of the exhaust-port in the valve to the other side of the diaphragm K K and be discharged through the other opening below the valve-seat M into the open air or elsewhere, as may be desired.

Fig. 2 is a top view of the valve proper, showing the inlet or receiving port A, the socket X, for reception of the valve'stem, which may be made circular, instead of rectangular, in forn1,with a proper feather and feather-way in stem, if preferred, 0 and 0 being the laps of the valve, while B shows the location and form by dotted lines of the exhaust-port S on the under side of the valve.

Fig. 3 shows more clearly the location and shape of the ports by a view of the under side of the valve N, A being the inlet or receiving port, S the exhaust-port, and Oand O the laps of the valve,while the dotted lines surrounding X show the outlines of the socket for the reception of the valve-stem.

Fig. 4 is a top view of valve-chamber with cover or cap removed, showing plan of diaphragm or valve-seat M, with location and shape of the ports A and B, one on each side of the second diaphragmK'K, (shown in dotted lines.) D is the inlet-opening over valveseat M, and E and H are outlets on either side of diaphragm K K, beneath the first diaphragm or valve-seat M, and communicating, respectively, with the ports A and B.

If, now, the valveN be placed upon the seat M in Fig. 1 so that port A, Fig. 2, correspends exactly with A, Fig. 4, it will be seen that a fluid entering the chamber through inlet D will pass through the port A of valve N, Fig. 2, and the port A of valve-seat M, Fig. 4, by means of outlet E, beneath valve-seat M, Fig. 4, to a reservoir in connection with the said outlet E. Should the valve then be rotated by means of its stem, so that the lap C, Fig. 2, covers port A, Fig. 4, the flow of the fluid through said port would be stopped, while, if the valve be rotated still farther in the same direction, so that the exhaust-port S, Fig. 2, shall correspond with and cover both the ports A B in valve-seat M, Fig. 4, the flow of fluid through E will be at liberty to return through A, Fig. 4, by means of the exhaustport S, Fig. 2, through port B, by way of the outlet H, Fig. 4, to the open air or other destination.

It will be observed that the outlet H, Fig. 4, can be put in communication with reservoir, if needed, instead of outlet E, and the operation repeated in the opposite direction by first making the port A, Fig. 2, correspond to port B, Fig. 4, and by rotating the valve in the opposite way to its first rotation the supply through B will be first cut ofl, and then retating the valve still farther in the same direction its exhaust-port will again be brought over the ports A B, Fig. 4, this time allowing the fluid to return from H, Fig. 4, by way of said exhaust-port and the ports B A in valve to the outlet E, in this case the discharge opening to the air through E instead of H, as before. It will also be observed that owing to the fact that the area of the valve-seat M, Fig. 4, is less by the area of one of its ports than the area of the valve N, Figs. 2 and 3, the preponderance of pressure on the upper or top side of valve N, owing to the difference of area, will keep said valve tightly to its seat, even should the pressure per square inch of area be somewhat greater through back-pressure on the under or lower side of said valve than 011 the upper side.

I claim as my invention 1. The casing divided by a horizontal partition, M, and vertical partition K into a chamber above the partition M and two chambers below, and having an inlet-port communicating with the upper chamber and an exit-port to each lower chamber, and ports in the partition above each lower chamber, in combination with a valve turning on the partition M, and having aport extending through the same, and adapted to coincide with either of the ports in partition M, and a larger port or recess in the lower face adapted to connect the ports of the said partition M, all substantially as described.

2. The combination, with the valve casing having a valve-seat in a partition above two chambers and a port communicating with each chamber, and a chamber and inlet-port above the partition, of a valve rotating on said seat, and with aport adapted to coincide with either of the ports in the partition, and a recess at the undersidelarger than the port and adapted the former larger than said combined areas to connect the two ports in the partition, suband adapted to connect the same, substantially stantially as described. as described.

3. The combination of the valve-seat having In testimony whereof Ihave signed my name I 5 5 two ports communicating with different chamto this specification in the presence of two bers below, a chamber above having an inletsubscribing witnesses. port, and a disk-valve turning on said seat, and with two ports, one in the face and the CHARLES DWELLE' other through the valve, the latter of less area Witnesses: IO than the combined areas of the ports in the CHARLES M. CAMPBELL,

seat and adapted to coincide with either, and J. 0. BALL. 

